install the origional sound blaster driver then install the patch. If that does not work go to sound blasters website and grab them directly.
The Dell website doesn't seem to list the SB driver in that Audio list, there is just a driver for the integrated audio, and that patch for SB that i mentioned.
Everest isn't telling me exactly what version I have, so even though I found the list of legacy cards on Sound Blaster's website, I am not sure which model it is:
Creative Worldwide Support
As for the Network drivers, I have found two downloads that look like they are close.
This one looks exactly right, but unfortunately is for Windows 95: Intel® PRO/100B Adapter Windows* 95 Driver Release [PRO95.EXE]
The only other ones I can find are on this list:Download Search Results!
The problem with the second link being that I am not sure if the 82557/82558/82559 model applies, look back to my everest screenshot of the network card to see what I mean.